Caculating machine



July 26, 1960 E. A. DAVIS CALCULATING MACHINE 5 Sheets-Sheet 1 Filed March 13, 1956 July 26, 1960 E. A. DAVIS CALCULATING MACHINE 5 Sheets-Sheet 2 Filed March 13, 1956 M- -M-HIMH gggg July 26, 1960 E. A. DAVIS CALCULATING MACHINE 5 Sheets-Sheet 3 Filed March 13, 1956 E. A. DAVIS CALCULATING MACHINE July 26, 1960 5 Sheets-Sheet 4 Filed March 15, 1956 July 26, 1960 E. A. DAVIS CALCULATING MACHINE 5 Sheets-Sheet 5 Filed March 15, 1956 u 5 MM@ '0 O 0 m I. I m I: O O- u 2 i mm FIE E United States Patent CACULATING MACHINE Elwood A. Davis, Castro VaHey, Calif., assignor to Friden, Inc., a corporation of California Filed Mar. 13, 1956, Scr. No. 571,289

6 Claims. (Cl. 235-63) This invention relates to calculating machines, and

- more particularly to a calculating machine having selection and actuating mechanism, a register carriage shiftable transversely of the machine and relative to the selection and actuating mechanism, one or more registers carried by the shiftable carriage and driven by the actuating mechanism and manually controlled register clearing mechanism driven by the actuating mechanism to clear, or zeroize, the registers.

It is among the objects of the present invention to provide actuator driven, register clearing mechanism which will clear the registers in any ordinal position of the carriage relative to the selection and actuating mechanism rather than returning the carriage to its limiting left-hand position relative to the selection and actuating mechanism before clearing the registers, as has previously been done.

It is also among the objects of the present invention to provide, in a calculating machine of the character indicated above, power-driven register clearing mechanism and power-operated mechanism enabled by depression of a manual control key to condition the register clearing mechanism for power operation in the same machine cycle in which the key is depressed.

It is further among the objects of the invention to provide in a calculating machine of the above indicated character, power-driven register clearing mechanism effective to clear the machine registers in any ordinal position of the register carriage relative to the carriage supporting portion of the machine, manually operable means for enabling the clearing mechanism to clear the registers during the first machine cycle after the manually operable means is operated, and mechanism effective to shift the carriage by ordinal steps to the left relative to the carriage supporting portion of the machine when the manually operable means is maintained operated for more than one machine cycle.

Other objects and advantages will become apparent from a consideration of the following description and the appended claims in conjunction with the accompanying drawings wherein:

Fig. 1 is a fragmentary elevational view of the righthand end of a calculating machine with the machine cover and most of the mechanism, except that directly concerned with the register clearing operation of the machine, omitted, and with some of the parts broken away and shown in cross-section to better illustrate the construction;

Fig. 2 is a fragmentary rear elevational view of the machine with the cover removed;

Fig. 3 is a fragmentary cross-sectional view substantially on the planes parallel to the top of the machine, such as indicated by the line 3-3 shown in Fig. 1, and shows a portion of the actuating mechanism of the machine and the carriage shifting and register clearing drive and control mechanism;

Fig. 4 is a cross-sectional viewon an enlarged scale substantially on a plane indicated by the line 4-4 shown in Fig. 3';

Fig. 5 is a cross-sectional view on an enlarged scale substantially on a plane indicated by the line 5-5 shown in Fig. 3; and,

Fig. 6 is a fragmentary top plan view of the machine carriage with the carriage cover removed.

The invention is disclosed in the accompanying drawings as applied to a well-known automatic calculating machine such as shown in the following United States patents:

2,229,889, patented Jan. 28, 1941 by C. M. F. Friden 2,273,857, patented Feb. 24, 1942 by C. M. F. Friden 2,310,281, patented Feb. 9, 1943 by C. M. F. Friden 2,313,817, patented Mar. 16, 1943 by C. M. Friden 2,650,761, patented Sept. 1, 1953 by A. B. Machado With continued reference to the drawings, the machine has a supporting frame including a base plate 20, lefthand and right-hand side plates 21 and 22, transversely extending, mechanism supporting plates, or bars, 23, 24, 25 and 26, and also has a control plate, not illustrated, disposed to the right of, and substantially parallel to, the right-hand frame plate 22.

Referring to Fig. 1, the main power shaft 30 of the machine extends through, and is journalled in, the righthand frame plate 22. A motor driven shaft 31 is dis posed in spaced and parallel relationship to the shaft 30 and is drivingly connected to the power shaft 30 by a speed reducing gear train including the gears 32, 33 and 34 and a single cycle clutch, generally indicated at 35.

The clutch 35 comprises a cam disk 40 secured on the shaft 30 on which the gear 34 is freely rotatable, a ratchet wheel 41, also rotatable on the shaft 30, secured to the gear 34, and a clutch dog 42 pivotally mounted at one end on the disk 35 and having intermediate its length, a tooth 43 engageable with the teeth of the ratchet wheel 41 to drivingly couple the gear 34 to the shaft 30. A spring 44, connected between the disk 35 and the free end of clutch dog 42, urges the dog in a direction to engage the tooth 43 with the ratchet wheel 41, and a transverse shoulder 45 is provided at the outer side of the clutch dog near the free end of the latter.

A clutch control arm 50 is pivotally mounted, intermediate its length, on the frame side plate 22 by a pivot screw 51 and has its lower end shaped to provide an abutment which engages the clutch dog shoulder 45 and holds the clutch tooth 43 out of engagement with the ratchet wheel 41 to disengage the clutch. When the control arm 50 is swung outwardly from the clutch it releases the clutch dog 42 and enables the spring 44 to move the tooth 43 into engagement with the ratchet wheel 41 to engage the clutch. A roller 52 on control arm 50 rides on the edge of cam disk 40 and the disk is so shaped that, once the control arm has been disengaged from the clutch dog shoulder 45 and the disk 40 has started to rotate with the shaft 30, the control arm will be held in clutch dog disengaging po'sition until the disk has made a complete rotation and has returned completely to its full-cycle position.

A lever 53 is disposed forwardly of the control arm 50 and is pivotally mounted, intermediate its length, on the frame plate 22 by a pivot screw 54. A link 55 connects the upper end of lever 53 to the upper end of clutch control arm 50 so that, when lever 53 is rocked in a clockwise direction, as viewed in Fig. 1, it rocks the clutch control arm 5:) in a clockwise direction to release the clutch dog 42 and engage the clutch 35 for one or more cycles of machine operation. Operation of the driving motor, not illustrated, is controlled by a conventional, normally open, switch, also not illustrated. The motor controlling switch is closed to energize the motor by a link 56 which extends from the switch to a pivotal connection 89 with the lower end of lever 53 and is moved forwardly of the machine to close the switch when the link 53 is rocked in a clockwise direction to engage the clutch 35. Link 55 is urged forwardly to disengage the clutch and open the motor switch, by a spring 57 connected between the forward end of the link 55 and the frame plate 22.

The cam disk 40 and roller 52 hold the switch closed until the cycle is completed so as to insure motor operation until the drive shaft returns to its original, or home, position, thus preventing incomplete cycles of operation.

A register clearing key 60 has a flat stem 61 slidably mounted on the front end portion of the frame plate 22 by vertically spaced-apart, fixed studs 62 and 63 extending through corresponding slots in the key stem. This key 60 is resiliently urged to its raised position by a spring 64 connected between the upper stud 62 and the key stem 61. 4

A bellcrank lever 65 is mounted at its angle on a fixed pivotal mounting 66 and has a rearwardly extending arm 67 and a downwardly extending arm 68. The bellcrank lever arm 67 carries at its distal end a roller 70 disposed in an opening 71 in the key stem 61, so that lever 65 is rocked in a clockwise direction, as viewed in Fig. 1, when key 60 is manually depressed. Bellcrank lever arm 63 is pivotally connected at its lower end to the forward end of a link 72 to shift the link forwardly when bellcrank lever 65 is rocked clockwise by depression of power clear key 60, It will be noted that key 60 is not provided with any latch-down means and, after being depressed, will be raised by spring 64 as soon as the finger pressure on the key is removed.

A lever 73 is pivotally mounted at one end on the frame plate 22 by a pivot screw 74 located below the lower end of the lever 53. The lever 73 depends from its pivotal mounting 74 and carries, near its lower end, a roller 75 and, intermediate its length, a stud 76, engaged in a longitudinally extending slot 77 in the rear end portion of link 72. Lever 73 is resiliently urged in a counter-clockwise direction by a spring 80 and is constrained to rock in a clockwise direction when link 72 is shifted forwardly by depression of key 60. Link 72 is resiliently urged rearwardly by spring 81.

A shaft 82 extends transversely of the machine near the base plate 20 and forwardly of the lever 73, and an arm 83 extends upwardly from this shaft near the righthand frame plate 22. The arm 83 has a tail portion 84 inclined downwardly and rearwardly from its upper end and extending under the roller 75 on the lower end of lever 73. When lever 73 is rocked forwardly by link 72, arm 83 is rocked rearwardly and shaft 82 clockwise, as viewed in Fig. l. A second arm 85 extends upwardly from shaft 82 inside of frame plate 22, and carries near its upper end a laterally projecting pin 86. An interponent lever 87, pivotally mounted intermediate its length on the frame plate 22 at 88, extends at one end under the pin 86 on arm 85 and at its other end rearwardly of the pin 89 which connects the lever 53 to the forward end of the switch control link 56. When arm 85 is rocked rearwardly by depression of the power clear key 60, lever 53 is rocked clockwise to engage the clutch 35 and close the motor switch. The clutch will remain engaged and the switch closed as long as key 60 is held down, and thereafter until the ends of the cycle in which the key is released.

on the rear transverse frame plate 26 by a rib 97 on the carriage frame, riding on the upper edge of a rail 98 disposed against the forward side of the rear crossplate 26. A front rail 99 is secured to the carriage frame 96 in spaced and parallel relationship to the front side of this frame and rides on rollers 100 carried by an intermediate fixed crossbar 101 to support the front side of the carriage.

The carriage carries a product register or accumulator, 102 and a counter, or quotient register, 103.

The accumulator register comprises an ordinal series of assemblies, each including a dial shaft extending through the frame 96 and carrying a numbered dial 111 on its upper end above the frame and a bevel gear 112 on its lower end below the frame. A tens-transfer earn 113 is mounted on each shaft 110 between the bottom surface of the frame 96 and the corresponding gear 112. A mutilated clearing, or zeroizing, gear 117, is mounted on each shaft 110within the hollow frame 96. -The dial drive gears 112 are driven by gear spools 114 on the square shafts of the well-known Thomas-type actuating mechanism, the dial shafts being selectively driven in either rotational direction, depending upon the longitudinal position of the spools 114 relative to the corresponding gears 112. A clearing rack 115 extends through the carriage frame 96, and when this rack is moved to the right by suitable means, such as the hand knob 116 extending upwardly from the right-hand end of the rack, the rack engages the mutilated gears 117 on the dial shafts and turns all of the dials 111 that are displaced from their 0 position back to their 0 position, thus clearing, or zeroizing, the register.

The counter, or quotient register, 103 comprises an ordinal series of assemblies, each including a shaft 120 extending between the front side of the carriage frame 96 and the front rail 99, a numbered dial 121 on each shaft 120 intermediate the length of the shaft, and a drive gear 122 on each shaft adjacent the corresponding dial. The counter register shafts are driven through the drive gears 122 by a counter actuator 123 of well-known construction, this actuator being driven from the actuating mechanism of the machine and turning the counter dials in a manner to record the number of machine actuating cycles. A mutilated clearing gear 124 is mounted on each counter register dial shaft 120, and a clearing rack 125, extending along the front side of the carriage frame 96, engages the clearing gears 124 and turns the counter dials back to their 0 position when the rack is moved to the right. The counter register clearing rack can be manually moved to the right by means of the hand knob 126 projecting upwardly from the right-hand of this rack.

Referring now to Fig. 6, a 0 stop slide 130 extends along the top of the carriage past the dial shafts 110 of the accumulator register, and a similar 0 stop slide 131 extends along the space between the carriage frame 96 and the front rail 99, past the counter register dial shafts 120. Each accumulator register dial shaft 1'10 carries a 0" stop cam 132, Fig. l, in alignment with the slide 130 and the slide is provided with ordinal fingers 133 which engage the coordinal cams 132 when the slide is shifted to the right and the dials 1 11 are turned to their 0 position to prevent overthrow of the dials and positively stop them in 0 position. Slide 130 is shifted to the right whenever the product register is cleared by a bellcrank lever 134 mounted at its angle on a pivot 135 fixed to the carriage frame 96, and having one end of one of its arms pivotally connected to the right-hand end of slide 130 and its other arm provided with a cam edge 136 which is engaged by the post of the hand knob 116 to rock the bellcrank lever when the v/ith which the stop cams 137 engage to stop the dials 5. 121 in position when the slide 131 is shifted to the right and the counter register is cleared. Slide 131 is shifted to the right when the clear rack 125 is moved to the right by a cam connection between the clearing rack 125 and the "0 stop slide 131, such cam connection being omitted from the present drawings but well-known to the art.

A power clearing slide 140 extends along the rear, upper edge of the carriage frame for operation by the power clearing mechanism, presently to be described, and has at its right-hand end a head, or offset formation, 141 carrying pins 142 and 143 spaced-apart transversely of the carriage. The hand knob 116 carries an arm 144 which is movable into, and out of, the path of pin 142 by turning the knob, and the hand knob 126 carries a similar arm 145 movable into, and out of, the path of the pin 143. By turning the hand knobs 1-16 and 126 into or out of engagementwith their respective pins 142 and 143, either or both of the registers 102 and 103 can be selectively engaged with, or disengaged from, respectively, the power slide 140, and thus conditioned for clearing or non-clearing by the power clear mechanism which includes the slide 140.

Referring now to Figs. 2 and 3, the carriage is shifted longitudinally of itself and transversely of the machine by a pin wheel 150 disposed at the rear side of the rear cross plate 26. The pin wheel 150 carries four pins 151 spaced-apart at equal angular intervals which engage in ordinal notches 165 in a notched rack 152 secured to the carriage frame and extending along the frame in spaced and parallel relationship to the rear side of the latter. A gear 153 is secured to the pin wheel '150 concentrically thereof, and a compound gear 154 is journalled on the cross plate 26 immediately below the gear 153 and includes concentric gear elements of which the smaller gear element 155 meshes with, and drives the gear 153, while the larger gear element 156 is disposed forwardly of, and out of the plane of gear 153. Drive gears 157 and 158 are journalled on the rear cross plate 26 to the right and left, respectively, of the gear element 156, the drive gear 158 meshing directly with gear element 156, while a reversing gear 159 is interposed between the gear 157 and the gear element 156.

The arrangement is such that gear 157 drives gear 159, compound gear 154, and gear 153 in a direction to effect a right-hand movement of the carriage, and gear 158, which rotates in the same direction as gear 157, directly drives compound gear 154 and hence gear 153 in a direction to effect a left-hand movement of the carriage. The gear ratios are such that a complete rotation of either of the drive gears 157 or 158 imparts one-fourth of a rotation to the pin wheel 150 and enables one of the four pins 151 to engage in an ordinal notch 165 in the notched rack 152, thus shifting the carriage one ordinal space to the adjacent ordinal position of the carriage.

As shown in Fig. 3, the actuating shafts carrying the stepped actuating drums 166 of the Thomas-type actuating mechanism, are driven from the main power shaft 30 by individual miter gear connections 167. The three right-hand actuator shafts 168, 169 and 170 are extended rearwardly, the shaft 168 being extended through the rear cross plate 26 and carrying on its rear end a cam 171 (Fig. 2) having a single lobe 172 of limited angular extent. The cam 171 constitutes an element of a car- .riage locking mechanism, illustrated and described in detail in Patent No. 2,636,678, patented April 28, 1953, by M. P. Matthew.

The two right-hand shafts 169 and 170 are provided at their rear ends with clutch devices 173 and 174, respectively, each including a clutch element rockable about a transverse pivot and rotatable with the corresponding actuator shaft, and the shafts 175 and 176 of the drive gears 158 and 157 are provided, forwardly of the rear cross plate 26, with clutch disks 177 and 178, respectively. Each clutch disk is provided with an opening disposed eccentrically of the rotational axis of the clutch disk and each rockable clutch element is provided with a rearwardly projecting tongue which engages in the opening in the corresponding clutch disk. When either element 173 or 174 is rocked to an operative position to engage its tongue in the opening of the disks, it rotates the associated drive gear 157 or 158 a full revolution for each cycle of machine operation. The tongues of the shiftable clutch elements have a loose fit in the openings of the corresponding disks to provide a few degrees of lost motion at the beginning of a shift cycle between the time the actuator shafts start to turn and the time the shaft 169 or starts to turn its corresponding drive gear 158 or 157.

The making of the rockable elements of the clutch devices 173 and 174 is accomplished by shift, or control, rods and 186, connected at their rear ends to yokes 187 and 188 engaging the rockable elements of the clutch devices 173 and 174, respectively, as disclosed in detail in Patent No. 2,636,678, noted above. The rod 185 extends forwardly from the yoke 187 in spaced and parallel relationship to the actuator shaft 169, through the cross plate 23. Forwardly of the cross plate the rod carries a compression spring 189 which resiliently urges the rod forwardly to disengage the corresponding carriage shift clutch 173. The rod 186 extends forwardly from the yoke 188, in spaced and parallel relationship to the actuator shaft 170, through the cross plate 23. It is provided forwardly of this cross plate with a compression spring 190 which resiliently urges rod 186 forwardly to hold the clutch 174 disengaged. The construction of the clutches is such, as shown in the above-noted patent, that when the corresponding control rod is released, the operating clutch is disengaged just at the end of the operating cycle during which the control rod was released.

Referring to Fig. 2, pin Wheel, or disk, 150 is provided with four peripheral projections 191 spaced at equal angular intervals therearound. Two bellcrank levers 192 and 193 are mutually opposed at respectively opposite sides of the disk 150 and are rockably mounted at their angles on fixed pivots 194 and 195, respectively, mounted on a support plate 203, supported on, and spaced from, cross plate 26. These levers have their upper ends terminating just below a plane parallel to the base plate of the machine and extending through the rotational axis of the disk 150, so that the upper ends of the levers engage under two diametrically opposite projections, or lugs, 191 on the disk 150, being urged to this position by a spring 196 connected between the levers above the pivotal mountings 194 and 195.

A rocker 200, Fig. 2, is pivotally mounted intermediate its length on the pivotal mounting 195 and carries at its left-hand end (right end in Fig. 2) a roller 201 which is engaged by the cam 171, to rock the rocker 200 when the cam 171 rotates its lobe 172 past this roller. A spring 202, connected between the rocker 200 and the support plate 203, urges the rocker in a direction to maintain the roller 201 against the cam 171. Two pins 204 and 205 extend through the rocker 200 at the locations of the yokes 187 and 188 (Fig. 3), respectively, and are urged rearwardly by these yokes against spring pressure, when the yokes are moved rearwardly to engage the corresponding carriage shift clutches. The lever 192 has a tail portion 206 overlying the pin 205 and engaged by this pin when the pin is projected, so that lever 192 is rocked out of engagement with the assicated lug on disk 150 to free the disk for rotation when the right shift clutch is engaged and the earn 171 is rotated to move its lobe 172 past the rocker roller 201. The lever 193 has a tail portion 207 which underlies the pin 204 and is engaged by this pin when the pin is projected, to rock the lever 193 out of engagement with the associated lug on .disk 150 to free the disk for rotation when the left shift clutch is engaged and the cam 171 initially rotated.

The cam lob-e 172 is substantially against the roller 201 when the cam is in full-cycle position. The lost motion provided in the right and left shift clutches permits the cam 171 to turn sufiiciently to rock the rocker 200 before the disk starts to turn. Except when a right or left shift is being made, the locking levers 192 and 193 hold the pin wheel, or disk, 150 and the carriage against movement so that the clearing slide 140 can be moved to clear the carriage supported registers without any consequent movement of the carriage.

Referring to Fig. 3, the left-hand actuator shaft 210 is extended rearwardly and a clutch mechanism 211 including a rockable element 212 is mounted on the rear end of this shaft. A clear cam shaft 213 is journalled in the rear cross plate 26 in alignment with the shaft 210 and is provided at the front side of cross plate 26 with a clutch disk 21 i engageable by the shiftable clutch element 212 to impart rotation to the cam shaft 213. A

clearing earn 215, best shown in Fig. 2, is mounted on shaft 213 between the rear side of rear cross plate 26, and a support plate 224 mounted on the cross plate. A lever 224} is pivotally mounted at its lower end on the cross plate 26 by a pivotal mounting 221 and carries, intermediate its length, a roller 222 bearing against the edge of cam 215. A spring 223, connected between lever 220 and the fixed support plate 224, urges the lever in a direction to maintain roller 222 against the edge of cam 215. Y

A slide 225 (Fig. 2) is disposed against the rear side of plate 26 and pivotally connected at its left-hand end (right end in Fig. 2) to the upper end of lever 220 by a pivotal connection 226 and is supported at its right end by a pin-255 secured to the rear cross plate 26 and embraced within an angled slot 229 formed in the slide. The slide is provided at its right-hand end, above guide pin 235 with an upward projection 227 terminating in a forwardly directed abutment formation, or tongue, 228. The slot 222 is inclined upwardly at an angle of approximately at its right-hand end so that the abutment 22$ is lifted upwardly as the slide is moved to the right (left in Fig. 2) by the operation of cam 215.

A toothed clearing rack 236 depends from the clearing slide 14-1}, and is secured to the slide by suitable means, such as the upwardly extending ears 237 and 238 on the rack and the screws 239 and 240 securing these ears to the slide. The rack 236 is provided along its bottom edge with ordinally spaced teeth, or projections, 241, there being as many of these teeth as the number of ordinal spaces through which the carriage is shiftable between its extreme right-hand and extreme left-hand positions. Each tooth 241 has an inclined edge at its right-hand side and has at its left-hand side an edge substantially perpendicular to the longitudinal center line of the rack 236.

In the normal, or full-cycle, position of the actuating slide 225, the stud 235 is in the right-hand (left-hand in Fig. 2) end of the slot 229 and the tongue 22% is below the bottom edges of the rack teeth 241, so that the carriage can be shifted freely without any interference between the rack 235 and the actuating slide 225. When the clearing cam 215 is rotated, it rocks the lever 220 to the right (to the left, or counter-clockwise, in Fig. 2), and this lever moves the auxiliary slide 225 to the right. During the first part of this right-hand movement of slide 225, the upwardly inclined, right-hand end of slot 229 moves past stud 235 and this raises the right-hand end of slide 225 to place the tongue 228 in the nearest interdental space of rack 236. Upon further movement of slide 225 to the ht the tongue 228 engages the left-hand edge of the rack tooth 241 immediately to the right of the tognue and moves the rack 236 and clearing slide 140 to the right (to the left in Fig. 2) a distance sufi'icient :to clear the carriage registers.

3 When cam 215 has turned through approximately 270, the roller 222 rides off of the high point 242 of earn 215, whereupon a spring 243, connected between the clearing slide and a stud 244, projecting from the rear side of the carriage frame, pulls the slide to the left (right in Fig. 2), back to its original position, and the spring 223 restores the actuating slide 225 to its inactive, or fullcycle, position. Stud 244 and a second stud 234 extend through longitudinally extending slots 245 and 246 in the slide 140 to guide this slide for rectilinear movement and limit the extent of left-hand movement there-of.

With the above-described mechanism, rotation of the clearing earn 215 will cause clearing of the selected carriage register or registers, regardless of the ordinal position of the carriage in its range of shifting movements, and it is not necessary to return the carriage to its limiting left-hand position for clearing, as has previously been the case.

Referring now to Figs. 3 and 5, a control rod 230 is disposed in spaced and parallel relationship to the actuator shaft 216 and has secured, at its rear end, a yoke, or abutment member, 231 which engages the rockable element 212 of the clearing clutch 211. A spring 232, surrounding the rod 230 between the cross plate 23 and the front end of the rod, urges the rod forwardly to hold the clearing clutch disengaged. The control rod 23% is moved rearwardly to engage the clearing clutch by mechanism extending between the control rod and the clearing key 60, Fig. 1.

As has been previously described, when the clearing key 60 is depressed, .it acts through the bellcrank lever 83 to rock the shaft 82 in a clockwise direction, as shown in Fig. 1. tion of the machine and, as shown in Figs. 3 and 5, an arm 243 is secured to, and extends upwardly from, this shaft substantially in alignment with the control rod 230.- An arm is 'rotatably journalled on, and extends upwardly from, a shaft 25% extending transversely of the machine rearwardly of, and parallel to, the shaft 82, and a link 251 pivotally connects the upper end of arm 248 to the upper end of arm 24), so that arm 249 will be rocked, clockwise as viewed in Fig. 5, when arm 248 is rocked. A pusher link 261 is pivotally connected at its forward end to the upper end of arm 249 and has its rear end provided with a notch receiving the front end of the control rod 230 in a manner such that one side of the notch rides on the top of the front end portion of the control rod and the other side of the notch bears against the front end of the control rod. A spring 252, connected between the pusher link 251 and a depending tail portion 253 of arm 249, urges the link 261 downwardly to engage the front end of the control rod 230 in the notch in the rear end of the link 2611. With the front end of control rod 25?; engaged in the notch in the rear end of link 2611, when the register clearing key as is depressed, control rod 239 is moved rearwardly to engage the register clearing 'clutch and rotate the clearing cam 215.

portion of link 261 and the link has a downwardly projecting extension 259 carrying a stud 26th which rides on cam 25%. The cam 25? acts through stud 260 to raise the pusher link 261 and disengage it from the control rod 230 approximately after the beginning of a cycle established by depression of the register clearing key 60. This lifting of link 261 occurs before the clearing operation has been completed, so that the clutch rod 230 can be released and the clutch conditioned for disengagement Shaft 82 extends transversely of the front porat the end of the clearing operation-the clearing clutch being held engaged until the end of the cycle by conventional means. When the pusher link 261 is disengaged from control rod 230, spring 232 urges the control rod to its forward position to condition the clearing cam drive clutch 211 for disengagement at the end of the cycle, at which time the cam 215 has been returned to its full-cycle position. When the cam 258 lowers the pusher link 261, the rear end of this link rides on the top of the control rod 230 and cannot re-engage the control rod until the clearing key is released. Depression of the register clearing key will thus produce a single clearing cycle and, if the clearing key is released before the end of this cycle, the selected register, or registers, will be cleared in the position occupied by the carriage at that time and the carriage will not be shifted. However, if the register clearing key is held down beyond the first, or register clearing cycle of the machine, the carriage will be shifted to the left for as many ordinal steps as the machine is cycled or until the carriage reaches its terminal left-hand position, as will be described hereafter.

Referring now to Figs. 3 and 4, a bellcrank lever 265 is mounted at its angle on shaft 82 adjacent the plane of the left shift control rod 185 and has one arm 266 extending upwardly from shaft 82 and a second arm 267 extending rearwardly from shaft 82 and carrying a stud 268 near its distal end. Lever 265 is rocked clockwise, as viewed in Fig. 4, when the register clear key 60 is depressed. An eccentric cam 270 is mounted on shaft 254 adjacent the ordinal position of the left shift push rod, or control rod, 185, and an eccentric follower 271 is rotatably mounted at its other end on the cam 270 and is provided at its other end with separate arms 272 and 273. The arm 272 is provided at its outer end with a hook formation 274 and the arm 273 is pivotally connected at its outer end to the rear end of a link 275. At its opposite, or front, end, the link 275 is provided with a longitudinally extending, closed slot 276 receiving a stud 277 carried at the outer end of bellcrank lever arm 266,

and a spring 278, connected between the stud 277 and the front end of link 275 urges the stud to the front end of slot 276. When shaft 82 and bellcrank lever 265 are rocked, clockwise as viewed in Fig. 4, by depression of the register clearing key 60, bellcrank arm 266, acting through link 275 and spring 278, rocks interponent 271 clockwise.

A bellcrank lever 285 is secured at its angle on shaft 250 and is provided with laterally projecting studs 286 and 287 at its upper and lower ends, respectively. When interponent 271 is rocked clockwise, as explained above, hook 274 is moved into engagement with stud 286 and, as cam 270 is rotated, interponent 271 is moved to rock bellcrank lever 285 and shaft 250 clockwise, as viewed in Fig. 4. An arm 288 is secured on, and extends upwardly from, shaft 250 to the left of the left shift control rod 185, and a pusher link 289 (Fig. 3) is pivotally secured at its front end to the upper end of arm 288 and is provided in its rear end with a notch (not shown but similar to the notch in the pusher link 261) receiving a stud 291. Stud 291 projects from the lower end of an arm 292, the upper end of which is secured to the lefthand end of a sleeve 293 rotatably mounted on a transverse shaft 294. An arm 306 projects downwardly from the right-hand end of sleeve 293 and a stud 307 projects to the right from the lower end of arm 306 and bears against the front end of the left shift control rod 185.

When shaft 250 is rocked by the hooked interponent 271, pusher link 289 is moved rearwardly and moves the control rod 185 rearwardly to engage the left shift clutch. Pusher link 289 is urged downwardly to engage the stud 291 by a spring (not illustrated) connected between a downwardly projecting extension on the pusher link and the arm 288 and the pusher link is raised at the end of a full left shift operation, by means including a bail leg 298, to free the control rod 185 and disengage the left shift clutch. A second pusher link 308 is disposed forwardly of, and in alignment with, the control rod 185 and is urged downwardly by a spring 295 connected between the shaft 250 and a downward extension 296 on the pusher link 308. This pusher link 308 is directly connected to the left shift control key and is not pertinent to the related mechanism.

A latch lever 300 is pivotally mounted at its rear end on 8. depending ar-m 301 of bracket 297 and extends forwardly from this bracket arm over the stud 287 projecting from the lower end of lever 285. A spring 302 connected between the latch lever 300 and the lower end of bracket arm 301 holds the latch lever down on the stud 287. Near its front end the latch lever is provided with a transverse shoulder 303 extending upwardly from its bottom edge and is provided forwardly of the shoulder 303 with an extension 304 of reduced width which overlies the stud 268 on the distal end of arm 267 of bellcrank 265.

When shaft 82 and bellcrank lever 265 are in their normal, or inoperative position, that is, when the clearing key 60 is raised, stud 268 engages latch lever extension 304 and holds latch lever shoulder 303 above the stud 287 and link 275 holds the hooked interponent 271 in position such that the hook 274 cannot engage the stud 286 to rock the shaft 250. When shaft 82 and lever 265 are rocked clockwise by depression of the register clearing key 60, interponent 271 is rocked to bring the hook 274 into position to engage the stud 286, and latch lever 300 is lowered to bring the shoulder 303 into position to engage the stud 281 on lever 285 and to latch bellcrank 285 in its operative position.

Near the end of the first cycle after the register clearing key 60 has been depressed and during which the se lected register, or registers, are cleared, cam 270 moves interponent 271, and hook 274 engages pin 286 to rock lever 285 and shaft 250 clockwise. This sets up a left shift operation by moving the pusher link 289, pin 291, lever 306, pin 307 and left shift control rod 185 (Fig. 3) rearwardly to engage the left shift clutch. When lever 285 is rocked clockwise, stud 287 is moved forwardly and shoulder 303 (Fig. 4) on latch lever 300 drops behind this stud to latch the mechanism in position with the left shift clutch engaged. If the register clearing key is held depressed beyond the first, or register clean'n cycle, an ordinal left shift of the carriage will take place during the second cycle and each machine operating cycle thereafter until the register clearing key is released or the carriage reaches its terminal left-hand position. Although the hook 274 will be moved away from stud 286 during each cycle as the eccentric cam 270 oscillates the interponent 271, lever 285 will be restrained by latch lever 300 against movement to release the left shift clutch until the register clearing key 60 is released.

When the register clearing key is released, a spring 305,

Fig. 1, connected between arm 85 and a fixed component of the machine, rocks shaft 82 counter-clockwise to its original, or inoperative position and this raises stud 268 to engage the extension 384 of the latch lever 300 to release stud 287 from latch lever shoulder 303. Counterclockwise rocking of shaft 82 also rocks interponent 271 to move the hook 274 out of position from engagement with the stud 286 on lever 285. Thus, with stud 287 on lever 285 released from latch lever 300 and stud 286 on this lever released from hook 274, spring 189 is enabled to move the control rod forwardly to disengage the left shift clutch and terminate the left shift operation. Mechanism is provided to automatically disable the left shift clutch in the event the carriage is shifted to its terminal left-hand position, and such mechanism is shown in Figs. 2 and 3.

Referring first to Fig. 2, a right-hand override pawl 310 (to the left in Fig. 2) is pivotally mounted at 311 on the right-hand end portion of the carriage shifting rack 152 and is urged by a spring 312 to rock in a clockwise direction, as viewed in Fig. 2, until a stud 313 on the right-hand end (left in Fig. 2) of the override pawl engages the bottom edge of the shift rack 152 to limit the clockwise rocking movement of the override pawl. The override pawl 310 is provided near its left-hand end (right in Fig. 2) with a notch 314 in which a pin 151 of the pin wheel 150 engages to move the carriage into its terminal left-hand position. Immediately to the right of the notch 314 (to the left of this notch in Fig. 2, which is a view from the rear of the machine), the bottom edge of the override pawl is formed to provide a cam edge which is engaged by one of the pins 151 in the machine operating cycle following the cycle which brought the carriage to its terminal left-hand position, to rock the override pawl 310 in a counter-clockwise direction, as viewed in Fig. 2. At its right-hand end (left-hand in Fig. 2) the override pawl 310 is provided with a downwardly extending abutment formation 315, which, when the carriage is in its terminal left-hand position and the override pawl is rocked counter-clockwise, as explained above, engages the top end of an override slide 316 and forces the slide downwardly.

The override slide 316 is mounted on the right-hand end portion of the back cross plate 26 by suitable means, such as the screws 317 and 318, extending through slots in the slide and secured to the back cross plate 26, and the slide is urged to its upper limiting position by a spring 319. At its bottom end the override slide 316 rides on the rear end portion of one arm of a bellcrank lever 32!) rockably mounted at its angle on a shaft 321 which extends transversely of the machine. A link 324 (Fig. 3) is pivotally connected at its rear end by pivot stud 325 to the lower end of a downwardly extending arm of the bellcrank lever 32% and is pivotally connected at its for Ward end to the upper end of an arm 322 extending upwardly and rearwardly from the right-hand end of a bail 326 rockably mounted on shaft 250. The bail leg 298 extends rearwardly of the shaft 250 at the left-hand end of bail 326 and is provided at its rear end with a laterally projecting abutment formation 339 which underlies the pusher link 289.

When the override slide 316 is forced downwardly by the override pawl 31% at the end of a full left shift of the carriage, link 324 is moved forwardly, rocking the bail 326, in a counter-clockwise direction when viewed from the right. This raises the abutment formation 33% of the bail, and that lifts the rear end of pusher link ass to disengage the pusher link 289 from the stud 291, thus releasing the control rod 185 to disengage the left shift clutch at the end of the coincident operating cycle. The left shift operation is thus terminated at the end of the first cycle after the carriage is moved to its terminal iefthand position, although the machine will continue to cycle idly if the register clearing key is held down after the left shift operation has been terminated.

With the above-described mechanism, the register clearing key 60 is effective, when depressed, to cycle the machine and cause clearing of a selected register or of both registers, at the ordinal position the register carriage happens to occupy at the time. If the clearing key is released before the end of the first cycle, no movement of the carriage will take place but, if the clearing key is held down after the first cycle, the carriage will be ordinally stepped to the left until the key is released, or the carriage reaches its terminal left-hand position.

I claim:

1. In a calculating machine having a plural order actuating mechanism, normally disabled cyclically operating power means for driving said actuating mechanism, a carriage shiftable transversely of the orders of said actuating mechanism, normally disabled shifting mechanism driven by said actuating mechanism for selectively shifting said carriage relative to said actuating mechanism, a plural order register carried by said carriage and selectively driven by said actuating mechanism, register Zeroizing mechanism carried by said'carriage, normally disabled power clearing mechanism selectively driven by said actuating mechanism for operating said zeroizing mechanism, and means driven by said power means for dis abling said zeroizing mechanism at the end of a single cycle of operation, a control means comprising a single key, means operated by the operation of said key for enabling said power means and said power clearing mechanism to drive said register zeroizing mechanism during the first cycle of operation following actuation of said control means and thereby zeroize said register in the coincidental position of said carriage relative to said actuating mechanism, and means operated by the continued operation of said key after said first cycle of operation for enabling said shifting mechanism to selectively shift said carriage in a predetermined direction and to a selected extent so long as said key is maintained in operated position beyond said first operating cycle.

2. In a calculating machine having a plural order actuating mechanism, normally disabled cyclically operating power means for driving said actuating mechanism, a carriage shiftable transversely of the orders of said actuating mechanism, normally disabled shifting mechanism driven by said power means for selectively shifting said carriage relative to said actuating mechanism, a plural order register carried by said carriage and selectively driven by said actuating mechanism, register zeroizing mechanism carried by said carriage, normally disabled power clearing mechanism driven by said power means and effective when actuated to operate said zeroizing mechanism to zeroize said register in any coincidental position of said carriage relative to said actuating mechanism, and means effective to disable said power clearing mechanism at the end of a single cycle of operation, a control mechanism effective to operate said clearing mechanism and simultaneously condition said shifting mechanism for the selective operation of said shifting mechanism in subsequent cycles comprising a single depressible key effective when depressed to actuate said power clearing mechanism and said power means, means driven by said power means and effective during operation of said clearing mechanism to enable said shifting mechanism for operation at the end of the cycle, and means controlled by the release of said key for disabling said shifting mechanism, whereby said control means is effective to zeroize said register during the first operating cycle after said key is depressed and to selectively shift said carriage if said key is maintained depressed beyond said first cycle.

3. In a calculating machine having a plural order actuating mechanism, normally disabled cyclically operating power means for driving said actuating mechanism, a carriage shiftable transversely of the orders of said actuating mechanism, normally disabled shifting mechanism driven by said power means for selectively shifting said carriage relative to said actuating mechanism, a plural order register carried by said carriage and selectively driven by said actuating mechanism, register zeroizing mechanism carried by said carriage, normally disabled power clearing mechanism driven by said power means and effective when enabled to actuate said zeroizing mechanism to zeroize said register in any coincidental position of said carriage relative to said actuating mechanism, and means effective to disable said power clearing mechanism at the end of a single cycle of operation, control mechanism actuated by a single key and effective to enable said power means and said clearing mechanism and simultaneously condition said shifting mechanism for the enabling thereof, means driven by said power means and effective to enable said shifting mechanism at the end of the cycle in which said shifting mechanism is conditioned, whereby said control means is effective to zeroize said register during the first operating cycle after said control means is actuated and to selectively shift said carriage if said control means is maintained actuated beyond said first cycle, and mechanism automatically disabling said shifting mechanism when said carriage is moved to a terminal position in said predetermined direction.

4. In a calculating machine having a plural order actuating mechanism, normally disabled cyclically operating power means for driving said actuating mechanism, a carriage shiftable transversely of the orders of said actuating mechanism, normally disabled shifting mechanism driven by said power means for selectively shifting said carriage relative to said actuating mechanism, a plural order register carried by said carriage, register zercizing mechanism carried by said carriage, and normally disabled power clearing mechanism selectively driven by said power means for operating said zeroizing mechanism, and a control mechanism comprising a single control key, means operated by the operation of said key for initiating operation of said power means and said power clearing mechanism to drive said register zeroizing mechanism during a first cycle of operation to zeroize said register in the coincidental position of said carriage relative to said actuating mechanism, means driven by said power means for disabling said power clearing mechanism at the end of said first cycle regardless of the operation or release of the key, means driven by said power means and effective during the operation of said power clearing mechanism to enable said shifting mech anism for operation in subsequent cycles of operation, and means controlled by the release of said key for disabling said shifting mechanism, whereby said shifting mechanism is operated to selectively shift said carriage in a predetermined direction so long as said key is maintained in operated position beyond said first operating cycle.

5. In a calculating machine having a normally disabled cyclically operating power means, a carriage shiftable transversely of the machine, normally disabled shifting mechanism driven by said power means for selectively shifting said carriage, a plural order register mounted in said carriage, register zeroizing mechanism mounted in said carriage, and normally disabled power clearing mechanism driven by said power means and effective when enabled to actuate said zeroizing mechanism to zeroize said register in any coincidental position of said carriage, a control mechanism eifective to invariably operate said clearing mechanism and simultaneously condition said shifting mechanism for the selective operation of said shifting mechanism in subsequent cycles comprising a single normally inoperative key elfective when operated to operate said power clearing mechanism and said power means, means effective to disable said power clearing mechanism at the end of a single cycle of operation, means driven by said power means and effective during 14 the single cycle of operation of said clearing mechanism to enable said shifting mechanism for operation at the end of the cycle, means controlled by the continued holding of the key depressed for continuing operation of said power means, whereby said control means is eifective to zeroize said register during the first operating cycle after said key is depressed and to selectively shift said carriage if said key is maintained depressed beyond said first cycle, and means operated by the release of said key for disabling said shifting mechanism.

6. In a calculating machine having a normally dis abled cyclically operating power means, a carriage shiftable transversely of the machine, normally disabled shifting mechanism driven by said power means for selectively shifting said carriage, a plural order register mounted in said carriage, register zeroizing mechanism mounted in said carriage, normally disabled power clearing mechanism driven by said power means and effective when actuated to operate said zeroizing mechanism to zeroize said register in any coincidental position of said carriage, a normally inoperative manipulatable member having an inoperative and an operative position, means for resiliently maintaining said member in its inoperative position, means operable by movement of said member from its inoperative to its operative position for initiating operation of said power clearing mechanism and said power means, means operated by said power means for disabling said power clearing mechanism at the end of a first cycle of operation, means operated by said power means during said first cycle of operation for conditioning said shifting mechanism for operation in subsequent cycles of continued operation, and means operated by the return of said member to its inoperative position to disable said power means and said shifting mechanism, whereby the operation of said member is efliective to zeroize said register during the first operating cycle after its operation and in subsequent cycles of continued operation to selectively shift said carriage if said member is held in its operative position beyond said first cycle.

References Cited in the file of this patent UNITED STATES PATENTS 2,229,895 Lothrop Jan. 28, 1941 2,294,948 Avery Sept. 8, 1942 2,310,281 Friden Feb. 9, 1943 2,329,649 Pinyan Sept. 14, 1943 2,330,512 Moody Sept. 28, 1943 2,531,204 Gang Nov. 21, 1950 2,780,411 Kiel Feb. 5, 1957 FOREIGN PATENTS 195,376 Switzerland June 16, 1938 

